Removes paints, varnishes, stains, lacquers and urethanes. Begins working in 30 minutes. Clings to vertical surfaces. Biodegradable. Non-flammable. Odor free. Contains no methylene chloride or caustics. Removes up to 15 layers. It can be brushed, rolled or sprayed on with an airless paint sprayer. Environmentally friendly. Works on interior and exterior surfaces.